EXPLANATORY KEY TO THE ARRANGEMENT OE THE 
FOREGOING GENERA— continued. 
Genera. 
Plate 
and 
Figure. 
59 
2 
59 
3 
59 
5 
59 
7 
59 
8 
59 
9 
59 
6 
60 
4 
60 
1 
60 
O 
& 
« 
O * 3 ^ 
hj H 
^ £> W 
« o S 
o III D ^ 
HQ 
<1 
w /Ischnocentrus 
P3 
W 
H 
tn 
O 
Ph 
Phrerotus 
Psilocentrus . 
Phaulocentrus 
Mferops 
Gargara 
£ lEmphusis 
Platycentrus . 
Tolania $ 
i> 
> t7> 
« J 
O < 
W Ph 
M S 
E g gj 
o & M 
W 3 
H B3 
Ah 
k t= 
^ m 
« ^ 
o ^ 
K W 
eh pj S I Brachybelus . 
Tolania c? 
<i 
PH 
Ah 
P 
m 
CHARACTERS OF POSTERIOR HORN. 
A. 
Ulnate. 
F. 
Rectilinear. 
B. 
Arcuate. 
G. 
Uncinate. 
C. 
Sinuate. 
H. 
Subulate. 
D. 
Dentate. 
I. 
Calcate or spurred 
E. 
Clavo-serrate. 
J. 
Obsolete. 
CHARACTERS OF SUPRAHUMERALS. 
a. 
Approximate 
Plate. 
. 49 
Fig. 
3 
b. 
Truncate 
. 50 
3 
c. 
Arcuate, bowed . 
. 53 
5 
d. 
Palmate, flattened 
. 54 
4 
e. 
Falcate, scythe-like 
. 55 
1 
Plate. Fig. 
/• 
Conate.... 
. 56 
7 
9- 
Divaricate, wide apart 
. 55 
5 
h. 
Clavate, clubbed . 
. 51 
2 
j- 
Subulate, awl-shaped 
. 52 
8 
k. 
Auriculate, eared . 
. 60 
1 
